The correct option is 1 and 3 only because Regional Rural Banks (RRBs) and Land Development Banks specifically focus on providing credit assistance to rural households, which is integral to supporting agriculture and enhancing rural livelihoods. RRBs were established to cater to the credit needs of the rural economy, while Land Development Banks aim to provide long-term loans for land development and agricultural activities. Conversely, the National Bank for Agriculture and Rural Development (NABARD) primarily functions as a development bank and does not extend direct credit to households; instead, it supports rural development initiatives and provides refinancing to financial institutions that do offer such assistance.